* {
  padding: 0;
  margin: 0;
  list-style: none;
  font-family: "微软雅黑";
}
body,
html {
  width: 100%;
  height: 100%;
  background: #ffffff;
}
.tan {
  display: flex;
}
header {
  height: 1.30666667rem;
  background: #d30000;
  color: white;
  font-size: 0.66666667rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
nav {
  width: 90%;
  height: 3.86666667rem;
  border: 2px solid #ebebeb;
  border-radius: 10px;
  position: absolute;
  top: 80px;
  left: 19px;
  background: #ffffff;
}
nav ul li {
  height: 1.30666667rem;
  border-bottom: 2px solid #e4e4e4 ;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
nav ul li span:nth-child(1) {
  padding-left: 0.26666667rem;
}
nav ul li span:nth-child(2) {
  padding-right: 0.26666667rem;
}
nav ul li span {
  display: block;
}
nav li:nth-child(3) {
  border-bottom: none;
}
nav li span {
  color: #333333;
  font-size: 20px;
}
.nav_a {
  width: 90%;
  height: 3.86666667rem;
  border: 2px solid #ebebeb;
  border-radius: 10px;
  position: absolute;
  top: 290px;
  left: 19px;
  background: #ffffff;
}
.nav_a ul li {
  height: 1.30666667rem;
  border-bottom: 2px solid #e4e4e4 ;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav_a ul li span:nth-child(1) {
  padding-left: 0.26666667rem;
}
.nav_a ul li span:nth-child(2) {
  padding-right: 0.26666667rem;
}
.nav_a ul li span {
  display: block;
}
.nav_a li:nth-child(3) {
  border-bottom: none;
}
.nav_a li span {
  color: #333333;
  font-size: 20px;
}
.nav_b {
  width: 90%;
  height: 3.86666667rem;
  border: 2px solid #ebebeb;
  border-radius: 10px;
  position: absolute;
  top: 500px;
  left: 19px;
  background: #ffffff;
}
.nav_b ul li {
  height: 1.30666667rem;
  border-bottom: 2px solid #e4e4e4 ;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav_b ul li span:nth-child(1) {
  padding-left: 0.26666667rem;
}
.nav_b ul li span:nth-child(2) {
  padding-right: 0.26666667rem;
}
.nav_b ul li span {
  display: block;
}
.nav_b li:nth-child(3) {
  border-bottom: none;
}
.nav_b li span {
  color: #333333;
  font-size: 20px;
}
